4.4 form 4 dangers of electricity
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This document discusses electrical hazard awareness and safety. It notes that electrical hazards can cause injury, death, fires or property damage. Some key electrical hazards include making contact with overhead power lines, working on live equipment, and using damaged electrical tools. The document provides guidance on responding to electrical incidents, types of electrical injuries, and measures to protect oneself from electricity such as turning off the power source, wearing appropriate clothing and using qualified personnel. It emphasizes taking precautions and following safety procedures to avoid electrical hazards.
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The document discusses key concepts about electricity including:
- Electric current is the flow of charged particles in a circuit. It is measured in amperes.
- Voltage is the electric potential difference between two points in a circuit. It drives the electric current and is measured in volts.
- Resistance opposes the flow of current and is measured in ohms. It varies based on the material's properties.
- Ohm's law states the relationship between current, voltage, and resistance in a circuit. Increased resistance decreases current.
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Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge.
Here are some examples of static electricity in our day to day life:
When we walk on a carpeted floor and getting shock when touching a door knob or any other metal object is one of the best examples of static electricity.
Clothes stuck to one another after being in the dryer is another example of static electricity.
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Static electricity occurs when objects become electrically charged through the transfer of electrons. Charging occurs when two materials are rubbed together, causing electrons to move from one material to the other. This leaves one material with an excess of electrons and a negative charge, and the other material with a deficit of electrons and a positive charge. The electric charges remain on the surface of the objects until they are given a path to ground or neutralize each other through contact or discharge.
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1) The document is a PowerPoint presentation about electricity created by Dheeraj Kumar Meena for class 10.
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3) Ohm's law explains the relationship between voltage, current, and resistance and states that at constant temperature, current is directly proportional to potential difference.
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current, voltage and resistance
The document discusses key concepts about electricity including:
- Electric current is the flow of charged particles in a circuit. It is measured in amperes.
- Voltage is the electric potential difference between two points in a circuit. It drives the electric current and is measured in volts.
- Resistance opposes the flow of current and is measured in ohms. It varies based on the material's properties.
- Ohm's law states the relationship between current, voltage, and resistance in a circuit. Increased resistance decreases current.
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Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge.
Here are some examples of static electricity in our day to day life:
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this ppt was created by me and i hope it helps to all of you out there. peace
objective : school projects
personal reference
teachers reference
i know its a bit lengthy but im 100% sure it will be helpful
plz leave a like
thxs
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3. Some examples of how Ohm's Law is applied in electric circuits and devices like DC power supplies, electric heaters, mobile phone chargers, and alternators.
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Electrostatic induction occurs when a charged object is brought near an uncharged conductor. This causes the redistribution of the conductor's electrons, leaving some regions positively charged and others negatively charged. If the conductor is grounded, electrons will flow to the ground, leaving it positively charged. When the charged object is removed, the conductor's charges spread uniformly again. Dielectrics, made of polar or nonpolar molecules, can be polarized by an external electric field through the alignment of their molecules' dipole moments, resulting in an internal electric field that opposes the external field. Dielectrics break down if the external field exceeds their dielectric strength.
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Krittika Das presented a PPT on her work experience. The PPT covered 10 chapters in her syllabus from April 2014 to March 2015 related to electricity, electrical components, tools, symbols, and domestic appliances. Chapter 1 discussed the scope of work education and defined direct current (DC) as current that does not change value over time and alternating current (AC) as current that changes value over time.
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Electromagnets Quiz
The document is a quiz on electromagnets and magnetism. It contains 10 multiple choice questions about diagrams showing electromagnets, how they work, and their applications. The questions cover topics like how to make an electromagnet stronger, what parts are responsible for sound in devices like bells and speakers, and how electromagnets are used in applications like trains.
Be prepared electrical safety
This document outlines several electrical safety precautions to observe when working with electricity. It recommends keeping generators outside to avoid dangerous fumes, turning them off before refueling, and staying 3 meters away from overhead power lines. Extension cables should not be modified and only factory-assembled cables used with strain relief. All electrical equipment should be visually inspected before use and any damaged items removed from service to prevent insulation breaks or exposed wires. Proper earthing of power supply systems and frequent inspection of electrical systems can help avoid injuries from electrical incidents.
Amit Electricals, Delhi, Lamp Holders
We are one of the leading companies engaged in the manufacturing,supply & export of electrical products.We also offer production and supply of material for BPL KITS.These come with ISI certification.
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The document summarizes Part 5 of the 17th Edition of the IEE Wiring Regulations, which consists of 6 chapters related to the selection and erection of wiring systems. Chapter 51 covers Common Rules, including general requirements for compliance with safety standards, identification of conductors, accessibility of equipment, and prevention of mutual interference. It addresses topics such as acceptable standards for electrical equipment, consideration of operational conditions and external influences, and labeling requirements.
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PRESENTATAION SLIDE FOR LEARNERS
IAAPI Webinar - Electrical Safety
The tenth webinar of Indian Association of Amusement Parks & Industries was a grand success.
The webinar was well attended by over 152 members from all across the country.
We thank Mr. Dayanand Arya of Adroit Control Engineers Pvt Ltd for the knowledgeable and excellent presentation.
Incorporated in the year 1999, IAAPI is India's Apex Body representing the Amusement, Leisure & Recreation Industry in India.
Topic: Electrical Safety
Presenter: Dayanand Arya, Founder Director - Adroit Control Engineers Pvt Ltd
Date & Time: 28/May/2020 4-5.00pm IST
YouTube: https://youtu.be/NlU2YVfmNHM
IAAPI Website: www.iaapi.org
IAAPI Facebook: https://www.facebook.com/IAAPIHq/
IAAPI Twitter: https://twitter.com/IAAPI_HQ
IAAPI LinkedIn: https://www.linkedin.com/in/iaapi-hq/
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The document discusses electric current, resistance, electromotive force, and some basic circuit concepts:
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The electromagnetic spectrum includes all types of electromagnetic waves, ranging from radio waves with the longest wavelengths to gamma rays with the shortest wavelengths. It consists of radio waves, microwaves, infrared, visible light, ultraviolet, X-rays and gamma rays. All electromagnetic waves travel at the speed of light, oscillate perpendicular to their direction of propagation, and can transfer energy. Lower frequency waves such as radio waves have longer wavelengths while higher frequency waves such as gamma rays have shorter wavelengths and more energy. Each type of electromagnetic wave has different properties and applications such as communication technologies, heating foods, vision, sterilization, and medical imaging.
3.4 form 4 dispersion of light
Dispersion is the separation of white light into a spectrum by refraction. It occurs because different colors of light travel at slightly different speeds through transparent substances like glass and water. When white light passes through a prism, violet light is deviated the most and red light is deviated the least, forming a visible spectrum. An example of natural dispersion is a rainbow formed by water droplets in the sky.
3.3 form 4 converging lens
Lenses bend light to form images, either converging or diverging. Convex lenses are thick in the middle and thin at the edges, converging light, while concave lenses are thin in the middle and thick at the edges, diverging light. Ray diagrams illustrate the path of light through lenses using lines representing rays and key points like the optical center, principal axis, focal points, and images. Images can be magnified or diminished, inverted or upright, and real or virtual depending on their position relative to the lens and focal points. Magnification is calculated by comparing the size of the image to the object.
3.2 form 4 light
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3.2 form 3 light
Light travels as waves and can undergo various interactions as it travels, such as reflection, refraction, and interference. Reflection occurs when light bounces off a surface, following the law that the angle of incidence equals the angle of reflection. Refraction happens when light passes from one medium to another of different density, causing it to change speed and bend according to Snell's law. Refraction is responsible for phenomena like dispersion and the apparent bending of objects in water.
3.1 form 4 general wave properties
Waves are disturbances that transfer energy through a medium from one point to another. They can be transverse waves, where the disturbance is perpendicular to the direction of travel, or longitudinal waves, where the disturbance is parallel. Waves have properties like wavelength, amplitude, frequency, and speed. The speed of a wave depends on its frequency and wavelength and can be calculated using the formula that the speed equals the frequency multiplied by the wavelength. Waves undergo behaviors like reflection, refraction, and diffraction as they interact with barriers and changes in their medium.
2.4 form 3 melting and boiling
This document discusses melting and boiling. It defines melting as the change from solid to liquid that occurs at a specific melting point temperature for each substance. Ice melts at 0°C. Boiling is defined as the change from liquid to gas, which occurs at the boiling point temperature for each substance. Boiling involves particles gaining enough energy to break free of liquid form. Evaporation only occurs at the surface of a liquid, while boiling can occur below and above the surface as bubbles form and rise. Melting and boiling points are specific to each pure substance and involve heat being used to weaken or break molecular bonds without changing temperature.
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Current descriptions of immersive learning cases are often difficult or impossible to compare. This is due to a myriad of different options on what details to include, which aspects are relevant, and on the descriptive approaches employed. Also, these aspects often combine very specific details with more general guidelines or indicate intents and rationales without clarifying their implementation. In this paper we provide a method to describe immersive learning cases that is structured to enable comparisons, yet flexible enough to allow researchers and practitioners to decide which aspects to include. This method leverages a taxonomy that classifies educational aspects at three levels (uses, practices, and strategies) and then utilizes two frameworks, the Immersive Learning Brain and the Immersion Cube, to enable a structured description and interpretation of immersive learning cases. The method is then demonstrated on a published immersive learning case on training for wind turbine maintenance using virtual reality. Applying the method results in a structured artifact, the Immersive Learning Case Sheet, that tags the case with its proximal uses, practices, and strategies, and refines the free text case description to ensure that matching details are included. This contribution is thus a case description method in support of future comparative research of immersive learning cases. We then discuss how the resulting description and interpretation can be leveraged to change immersion learning cases, by enriching them (considering low-effort changes or additions) or innovating (exploring more challenging avenues of transformation). The method holds significant promise to support better-grounded research in immersive learning.
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
The technology uses reclaimed CO₂ as the dyeing medium in a closed loop process. When pressurized, CO₂ becomes supercritical (SC-CO₂). In this state CO₂ has a very high solvent power, allowing the dye to dissolve easily.
Compexometric titration/Chelatorphy titration/chelating titration
Classification
Metal ion ion indicators
Masking and demasking reagents
Estimation of Magnisium sulphate
Calcium gluconate
Complexometric Titration/ chelatometry titration/chelating titration, introduction, Types-
1.Direct Titration
2.Back Titration
3.Replacement Titration
4.Indirect Titration
Masking agent, Demasking agents
formation of complex
comparition between masking and demasking agents,
Indicators/Metal ion indicators/ Metallochromic indicators/pM indicators,
Visual Technique,PM indicators (metallochromic), Indicators of pH, Redox Indicators
Instrumental Techniques-Photometry
Potentiometry
Miscellaneous methods.
Complex titration with EDTA.
Randomised Optimisation Algorithms in DAPHNE
Slides from talk:
Aleš Zamuda: Randomised Optimisation Algorithms in DAPHNE .
Austrian-Slovenian HPC Meeting 2024 – ASHPC24, Seeblickhotel Grundlsee in Austria, 10–13 June 2024
https://ashpc.eu/
Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...
The pygmy halfbeak Dermogenys colletei, is known for its viviparous nature, this presents an intriguing case of relatively low fecundity, raising questions about potential compensatory reproductive strategies employed by this species. Our study delves into the examination of fecundity and the Gonadosomatic Index (GSI) in the Pygmy Halfbeak, D. colletei (Meisner, 2001), an intriguing viviparous fish indigenous to Sarawak, Borneo. We hypothesize that the Pygmy halfbeak, D. colletei, may exhibit unique reproductive adaptations to offset its low fecundity, thus enhancing its survival and fitness. To address this, we conducted a comprehensive study utilizing 28 mature female specimens of D. colletei, carefully measuring fecundity and GSI to shed light on the reproductive adaptations of this species. Our findings reveal that D. colletei indeed exhibits low fecundity, with a mean of 16.76 ± 2.01, and a mean GSI of 12.83 ± 1.27, providing crucial insights into the reproductive mechanisms at play in this species. These results underscore the existence of unique reproductive strategies in D. colletei, enabling its adaptation and persistence in Borneo's diverse aquatic ecosystems, and call for further ecological research to elucidate these mechanisms. This study lends to a better understanding of viviparous fish in Borneo and contributes to the broader field of aquatic ecology, enhancing our knowledge of species adaptations to unique ecological challenges.
bordetella pertussis.................................ppt
Bordettela is a gram negative cocobacilli spread by air born drop let
SAR of Medicinal Chemistry 1st by dk.pdf
In this presentation include the prototype drug SAR on thus or with their examples .
Syllabus of Second Year B. Pharmacy
2019 PATTERN.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
Phenomics assisted breeding in crop improvement
As the population is increasing and will reach about 9 billion upto 2050. Also due to climate change, it is difficult to meet the food requirement of such a large population. Facing the challenges presented by resource shortages, climate
change, and increasing global population, crop yield and quality need to be improved in a sustainable way over the coming decades. Genetic improvement by breeding is the best way to increase crop productivity. With the rapid progression of functional
genomics, an increasing number of crop genomes have been sequenced and dozens of genes influencing key agronomic traits have been identified. However, current genome sequence information has not been adequately exploited for understanding
the complex characteristics of multiple gene, owing to a lack of crop phenotypic data. Efficient, automatic, and accurate technologies and platforms that can capture phenotypic data that can
be linked to genomics information for crop improvement at all growth stages have become as important as genotyping. Thus,
high-throughput phenotyping has become the major bottleneck restricting crop breeding. Plant phenomics has been defined as the high-throughput, accurate acquisition and analysis of multi-dimensional phenotypes
during crop growing stages at the organism level, including the cell, tissue, organ, individual plant, plot, and field levels. With the rapid development of novel sensors, imaging technology,
and analysis methods, numerous infrastructure platforms have been developed for phenotyping.
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4.4 form 4 dangers of electricity
- 2. www.dmp.wa.gov.au/ResourcesSafety What does hazard mean? Hazard means: • any potential or actual threat to the wellbeing of people, machinery or environment Electrical hazard safety means: • taking precautions to identify and control electrical hazards
- 3. www.dmp.wa.gov.au/ResourcesSafety Why know about it? Because failing to take the necessary precautions can lead to: • injury or death • fire or property damage
- 4. www.dmp.wa.gov.au/ResourcesSafety What are the safety priorities? Electrical hazards include: • making contact with overhead wires • undertaking maintenance on live equipment • working with damaged electrical equipment, such as extension leads, plugs and sockets • Old frayed wiring may heat up and melt the insulation causing a short- circuit and a fire. • Long coiled up extension cables may heat up. • Water in sockets and plugs may cause a short circuit or electric shock because water is a poor conductor of electricity. • Accidentally cutting cables may cause electrocution. • Electrocution may cause brain damage, cardiac arrest and burns.
- 5. www.dmp.wa.gov.au/ResourcesSafety How do you respond to electrical incidents? If you come across a person receiving an electric shock: • if possible, disconnect the electrical supply (switch?) • assess the situation – never put yourself at risk • take precautions to protect yourself and anyone else in the vicinity • apply the first aid principles (e.g. DRSABCD) • assess the injuries and move the casualty to a safe area if required • administer first aid if trained • seek urgent medical attention
- 6. www.dmp.wa.gov.au/ResourcesSafety Do you want to be a victim? You could be the victim if you: • don’t follow proper procedures around electricity • use electrical equipment improperly • use faulty electrical equipment
- 7. www.dmp.wa.gov.au/ResourcesSafety What are the types of injuries? • Burns • Shocks • Falls KEEP SAFE KNOW HOW TO CONTROL ELECTRICAL HAZARDS
- 8. www.dmp.wa.gov.au/ResourcesSafety What are the levels of effect of current? AC current (mA) Effect on human body 1 Slight tingling sensation 2-9 Small shock 10-24 Muscles contract causing you to freeze 25-74 Respiratory muscles can become paralysed; pain; exit burns often visible 75-300 Usually fatal; ventricular fibrillation; entry & exit wounds visible >300 Death almost certain; if survive will have badly burnt organs and probably require amputations
- 9. www.dmp.wa.gov.au/ResourcesSafety GROUP DISCUSSION • What measures ought to be put in place to keep safe from electricity?
- 10. www.dmp.wa.gov.au/ResourcesSafety Can you protect yourself from electricity? • Don’t wear metal objects • Turn power off • Wear appropriate clothing • Don’t touch live parts • Don’t install or repair electrical equipment • Use qualified personnel • Clean and dry leads and plugs before use
- 11. www.dmp.wa.gov.au/ResourcesSafety What are other safety measures? • Heed warning signs • Use the right equipment • Study the operation manual • Take care of extension leads • Use only approved extension lamps • Don’t pull on leads • Use residual current devices – RCDs • Use the proper fuses and circuit breakers
- 12. www.dmp.wa.gov.au/ResourcesSafety Regular safety inspections are a part of YOUR job... • Electrical equipment should be checked each time before use for defects • If not tagged or the tag is out of date then report it and place it out of service
- 13. www.dmp.wa.gov.au/ResourcesSafety Should you be aware of powerlines? • Do you know if there are overhead powerlines on your site? • Do you know where they are located? • Do you know what the safe work clearance is? • Strict regulations are laid down to cover any work that may have to be performed close to overhead powerlines
- 15. www.dmp.wa.gov.au/ResourcesSafety Is this a problem?
- 16. www.dmp.wa.gov.au/ResourcesSafety The key messages are… • The risk of electric shock from correctly installed and maintained power sources is negligible, provided that sensible precautions are taken by the operator and correct work procedures are followed • Ensure that the right person is carrying out electrical work – licensed versus competent • Electricity is essential but, improperly used, it can be DEADLY! To STAY ALIVE, you have to STAY ALERT
Editor's Notes
- D - Danger R - Response S – Send for help A - Airway B - Breathing C - CPR D - Defibrillation
- This absolute shocker is a shocker in the literal sense. If you look carefully, you will notice that the power lead plug-top is not designed and intended for use within an Australian socket outlet. This should have warned the user that the appliance may not have been designed for use within the Australian 240 Volt system, but rather the 110 Volt system in so many other countries. But it seems that some people just wont take the hint. What we see here is a dangerously novel variation on the age-old stupidity of trying to force a square peg into a round hole. If it won’t fit – don’t use it!